Eclipse

Use either Sun Java (Debian package: sun-java6-jre) or OpenJDK (Debian package: openjdk-6-jre). GNU Java (GCJ) may be too slow. If you experience problems with Sun Java, it may be IPv6 - to resolve it, add a new line-Djava.net.preferIPv4Stack=true in the end of eclipse.ini (it must be after -vmargs)